had a couple of drop in units and a dedicated upper (spikes). enjoyed them all. the dedicated was more accurate but 3x the cost. i wasn't concerned with moa accuracy--just popping metal plates etc.
with a move to a different state--decided to sell all my ar stuff. as i reload for 45acp, i bought a uzi 45 (grease gun lower) and just bought another lower for my new uzi 22 conversion.
now, just waitin on a tax stamp from uncle sam.